Honeycomb detector unit



Oct. 4, 1960 F. o. PASCHALL HONEYCOMB DETECTOR um'r Filed March 21, 1960T0 DUAL AUDIO AMPLIFIERS INVENTOR.

United States Patent HONEYCOMB DETECTOR UNIT Frederick O. Paschal],Maspeth, N.Y.

Filed Mar. 21, 1960, Ser. No. 16,468

1 Claim. (Cl. 338-100) This invention relates to radio and televisiongrid leaks and has as its main object the idea of establishing twoparade grounds of large size composed of ground up pieces of coal andcoke made into two sections and joined together with a suitable binder,the whole block being about 1 /2 inches in size, all over, more or less,according to capacity requirements and each side is flat and smooth, sothat two, three or more very thin metal contact plates lie flat againstthe blocks surfaces and are held in firm engagement by loose pieces ofinsulation placed on top of the top output plate and the input platefacing the front side of the block so that set screws can put pressureagainst them, which is suflicient pressure to hold all the elementsunder pressure against the block by the screws being threaded throughthe top and front side of the box in which it is housed.

The idea of the parade ground is that the two sections, the input onehas up to around thirty thousand ohms resistance while the output onehas practically none and this forms an ideal grid leak for real highfidelity.

The reason why such a low value of resistance produces such good resultsis the fact that the RF. signal has been broken up and shunted into manychannels of carbon in passing through the input section and when it hitsthe output section it is perfectly modulated and also amplified as ithits the control grids of the two detectors, due mainly to the size andalmost perfect inductance of this output section of coke.

This unit is so perfectly balanced that no condenser is needed, such asother grid leaks need.

The kind of coal used in this unit has a resistance of from about threethousand to thirty thousand ohms resistance, due to its carbon contentand this runs in veins all through the coal, some lines fast and someslower.

Coke is an excellent conductor of electric impulses and when it isground up into small particles and mixed with the proper amount of coalparticles for the output section the signals are built up into moresolid notes and this is good for the heavy beat notes that make goodhigh fidelity music, as it goes into two separate detector tubes and isamplified through two separate channels all the way to the speakers,and, due to the fact that this second section is so fast and onedetector tube is fed from the top plate of the output section and theother detector tube fed from the bottom plate both of these plates haveexactly the same ohmic readings this insures that the two channels willremain equal in volume.

Different capacities can be made in the unit by varying the amount ofcoke dust in the input section and by varying the size of the contactplates.

The units will average from about 3,000 to 10,000 ohms resistancebetween the input plate and the two output plates, and this is far lessthan the grid leaks heretofore have used, which ran from 100,000 toseveral million ohms and this high amount of resistance makes for sharpand high-pitched notes which have a tendency to cut off much of thebeauty of the low notes desired in high fidelity.

This honeycomb unit does not need high resistance to 2,955,270 PatentedOct. 4, 1960 modulate signals but does it in a new and improved manner.

The formula for the input section of the honeycomb is about three partsof coal particles to /2 part coke dust. The coke dust is to step up thecoals induction just a little. The output section is about three partscoke particles to one part coal particles. These are mixed, separately,with a suitable binder, and moulded into one block, under pressure.

There is nothing to get out of order and they will outlast the receiver.

This unit has no voltage value at all, hence it cannot conflict withsemi-conductors or transistors both of which require battery operation.

To the accomplishment of the foregoing my invention consists of theelements and their relation one to the other, as herein particularlydescribed and sought to be defined in the claim: reference being had tothe accompanying drawings which show the preferred embodiment of myinvention, and in which:

Fig. 4 shows all the elements in their set-up positions.

A is the input section and B the output section of the honeycomb blockand they are joined directly together with a suitable binder.

C is the metal input plate which is pressed against A by a loose pieceof insulation shown as G, so as to press the metal input plate firmlyagainst the input section via a setscrew threaded through the front sideof the box housing.

D is the bottom metal plate lying directly underneath B, the outputsection, and is connected to the grid of one detector tube.

E is the metal plate lying directly against the top of the outputsection and is connected to the grid of the other detector and thismakes push-pull detectors.

F is a loose piece of insulation lying on top of E plate and is held intight engagement by a setscrew which is threaded through the top of thebox housing.

G is also a loose piece of insulation and it presses against the pickupplate C shown in Fig. 2 via a setscrew I which is threaded through thebox housing on the front side.

H shows the setscrews to all three contact plates.

I shows the box housing which is made of Lucite, or such like,insulation.

Fig. 1 and Fig. 3 are cutaway views of little consequence.

Fig. 5 shows where this unit is placed in a receiver.

The detailed description of the preferred embodiment of this inventionis not to be construed as limiting the scope of the invention, inasmuchas many variations may be made by those skilled in the art within thescope of the invention.

Having thus fully described the invention, what I claim as new anduseful and desire to secure by Letters Patent, is:

A block composed of ground up particles of coal which has a carboncontent, coke and coke dust made into two different degrees ofresistance into two different sections with the two sections firmlyglued together and the section having the higher resistance, with ametal contact plate pressing against its front side, being for the inputand the other section, the output, has practically no resistance, buthas two metal plates, one lying directly underneath it and the otherlying directly on the top side of this section with all three contactplates having terminal means.

Little Oct. 16, 1928 Lowry May 9, 1933

